Internal-combustion engine



May 22, 1923.

H. J. FLEDDERMAN 4 INTERNAL coMBUsTIoN ENGINE 2 Sheets-sheet 1 A si;

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led Aug. 25 1920 ATTORNEYS i May 22,-1923.

' 1,456,125 H. J. FLEDDERMAN A INTERNAL coMBUsTIoN ENGINE Filed Aug. s. 1920 2 sheets-sheet 2 ...Wflllvfi Paameamy 2z, 19523.

unirse STATES wams PATENT carica;

n ERMAN JOSEPH FLEDDERMAN, '0F TULs, oxLAHoMA.

INTERNAL-COMBUSTIQN- ENGINE.

Application lcd August 2 5, 1920, Serial No. 406,002.

To all whom it 'may concern:

Be it known that I, HERMAN JosEPH FLEDDERMAN, a citizen of the United States, and a resident of Tulsa, '1n the county of Tulsa and State of Oklahoma, have invented ""certain new and useful Improvements 1n Internal-Combustion Engines, of which the following is a specification.

My invention is an improvement in internal combustion engines, and has for its object to provide an engine of the character specified, having, combustion chambers at each end of the cylinder, together with means for supplying fuel'to the said ends,y yand for permitting the waste products to exhaust, the inlet and the exhaust ports being controlled by sleeve valves, mounted to reciprocate,A and controlled b the movement of the piston, each end o the cylinder having igniting devices.

1n the drawlngs,

Figure 1 is a vertical section of one cylinder of the improved motor,

Figure 2 is a front view of the valve sleeves,

Figure 3 is a horizontalA section through the cylinder and associated elements.

and at the upper end thejacket and the zylinder are closed by a head 7--8, the portion 7 of the head closing the engine frame castwhile the portion 8 closes the end 'of the cylinder. This head has av central threaded opening for engagement by al spark plug 9,

and a second pluglO is engaged with the engine frame castin lat the lower vend of the cylinder, .the sai plugs extending in to the cylinder.

The piston 5 has the usual packing rings, and it 1s connected by a rod 11 with a crosshead 12, which moves in a guide 13. The piston rod, as clearly shown in Figure 1, is threaded throughv an axial opening in the piston, and is engaged by a nut 14 labove the piston.' t its lower end, the rod engages a threaded recess in the -crosshead, and is locked by a nut 15. A connecting rod 16 connects the cross-head with a crank 17 of the crank shaft indicated at 18, 'the said ,shaft being journaled in bearings-19 in the crank casing. vAt the lower end of the `'cylinder, the rod passes through a stuing box 2 0 of usual construction, and the connecting rod is connected to the crank by a sectional bearing 21. Y

As illustrated in Figure 1 the cross head 12 is in the formv of an inverted cup and is gradually decreased' in diameter toward its' forward end to provide a baille whereby the oil is confined in the lower portion of the engine.

The cylinder has intake ports 22 and 22", and exhaust ports 23 and 23, at its upper and lower ends, andithese ports are in registerwith other ports 24:, and 24B, and 25 and 25a in the frame'casting. vValve sleeves 26 and 27 are arranged in the space between the cylinder andthe engine frame casting,

the sald sleeves being concentric, and fittingv one within the other, and the sleeve 27 is the inner sleeve. These sleeves have ports for placing the ports 22-24, 22a and 24, 23-25, 23a and 25, in communication, and the sleeves are controlled b` an eccentric shaft 29, which is journale vin the crank case at one side of the crank shaft and par' allel therewith. This eccentric shaft has 2 crank arms 30 and 30, and thesearms are connected Vby links 31 and 31a, with the valve sleeves 27 and 28 respectively. The cranks 30 and 30a are' arranged at angles of 120' degrees with respect to each other, and the eccentric shaft is journaled in suitable bearings 33.

As clearly shown in Figure 1, the piston 5 is hollow, being an annular chamber for lubricant, and this chamber communicates -with longitudinally extending passages 34 and 34in the piston rod, by means of lateral lpassages. The passage 34 communicates at its lower end with the interior of the cross-head guide, and the passage 34a com- 'municates at its lower end with an axial passage 35 in the crank shaft and inthe cranks. This passage 36v extends longitudinally of the crank shaft, and passes outl wardly through each crank, and a continuation passes from the crank pin through the cross-head to the assage 34a.

A system for lu ricating and cooling oil,

v`this time.

indicated at 37, communicates with the axial -passageand the crank shaft by means of gears 39 and 40 constituting a reducing gear.

rIhe operation of theY motor, which is a double acting motor, having explosion chambers on both sides of the piston, is as follows-When' the piston moves outwardly, a char e isdrawn into the upper end of the cy inde'r, while that already drawn into the lower end is compressed, the .valves 26 and 27 admitting the charge to the upper end during this movement, while they are closed at th'e lower end. The charge at the lower end is compressed, and

'as'the piston reaches the end 4of its downward stroke, the charlfe is ignited` The piston .is driven outwa and the charge at the outer end is compressed, the ports at the outer end being closed at this time. The

ports at the. inner end are now open, and as the charge at the outer end is ignited, the piston is driven inward, driving out the eiihaust products at the inner end of the cylinder, the exhaust valve being openv at When the piston returns outward, the exhaust ports 23 and 25' are open, and the exhaust gases at the outer end of the cylinder are driven out. Meanwhile a charge is being drawn into the inner end of the cylinder, the ports 22 and 2da being open, and as the piston moves inward, thisV charge is compressed. At this time the ports 22 and 24: are open, while the ports 23 and 25 are closed, and the moving inward of they piston draws a charge into the outer end of the cylinder. Thusin each cycle of the engine a chargeis drawn into each end of the cylinder, compressed and ignited, and the exhaust gas is driven out of both ends of the cylinder.

I'claimz- LAn internal combustion engine comprising a cylinder, a piston therein, a rod rigidly secured to said piston, the lower end of said cylinder y bein provided with means providing a gas tight connection between the lower end of the cylinder and said rod, a cross head in the form of an inverted cu rigidly secured to the lower end of sai ,rod and gradually and uniformly decreased lin diameter toward its upper end to form an' o-il baiiie, a tubular guide depending from the lower end of said cyllnder and receiving said cross head, and

a connecting rod secured to said cross head.

2. In an internal combustion engine, a cross head comprising a body in the form of a cup havingvits upper side formed with means Wherebythe same may be connected to the lower end of a piston` rod, and means arranged Within lthe body for connecting the body to the rod of a crank shaft, said body being interiorly and exteriorly decreased in diameter toward its upper end to form an oil baie, said body being adapted to operatewithin a tubular guide.

Il-iElUiiAii .HSEEH FLEBDERMAN. i 

